chemistry Lab 4,5, & 7

Lab 4 Molar Mass CHEM101L

Student Name: Click here to enter text.

Access Code (located on the lid of your lab kit):

Pre-Lab Questions:

1. Imagine you are a guest speaker at a kindergarten class and you are asked to explain Avogadro’s number. What would you say and why?

2. Draw a diagram explaining the relationship between atoms, moles, and molecules. Insert your drawing with your handwritten name and access code clearly visible.

3. Why is Avogadro’s number referred to as a mole?

Experiment 1: Percent Sugar in Bubble Gum

Table 1: Sucrose Data

Mass of weight boat	Mass of weigh boat + un-chewed gum	Mass of un-chewed gum	Mass of chewed gum	Mass of sugar	Percent of sugar
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Post-Lab Questions

1. What is the percent sugar? Show your calculations.

1. What is the molar mass of sugar C12H22O11? Show your calculations.

1. Convert the mass of dissolved sugar to moles. Show your calculations.

1. Convert the moles of sugar to molecules of sugar. Show your calculations.

1. Convert molecules of sugar to grams of sugar. Show your calculations.

1. Imagine that you used four pieces of gum instead of two. Calculate the number of moles. Show your calculations.

1. How does the mass of the saliva alter the experimental data?

1. Insert a photo of your completed lab with your name and access code handwritten in the background.